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3. Functional Description
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Figure 3-1. FT2232 Schematics
Power Select
Power supply selection interface: the ESP-WROVER-KIT can be powered through the
USB interface or the 5V Input interface. The user can select the power supply with
shorting jumpers. More details can be found in Chapter 4.
Power Key
Power on/off button: toggling to the right powers the board on; toggling to the left
powers the board off.
5V Input
The 5V power supply interface is used as a backup power supply in case of full-load
operation.
LDO
NCP1117(1A). 5V-to-3.3V LDO. (There is an alternative pin-compatible LDO —
LM317DCY, with an output current of up to 1.5A). NCP1117 can provide a maximum
current of 1A. The LDO solutions are available with both fixed output voltage and
variable output voltage. The relevant schematics are shown in Figure 3-2.
Camera
Camera interface: a standard OV7670 camera module is supported.
RGB
Red, green and blue (RGB) light emitting diodes (LEDs) are controlled by pulse width
modulation (PWM).
I/O
All the pins on the ESP32 module are led out to the pin headers on the ESP-
WROVER-KIT. Users can program ESP32 to enable multiple functions such as PWM,
ADC, DAC, I2C, I2S, SPI, etc.
Micro SD Card
Micro SD card slot for data storage: when ESP32 enters the download mode, GPIO2
cannot be held high. However, a pull-up resistor is required on GPIO2 to enable the
Micro SD Card. By default, GPIO2 and the pull-up resistor R153 are disconnected. To
enable the SD Card, use shorting jumpers on JP1 as shown in Figure 3-3.
LCD
ESP-WROVER-KIT supports mounting and interfacing a 3.2” SPI (standard 4-wire
Serial Peripheral Interface) LCD, as shown in Figure 2-3.
Interface/Module
Description
Espressif
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